diff --git a/sox.cabal b/sox.cabal
--- a/sox.cabal
+++ b/sox.cabal
@@ -1,5 +1,5 @@
 Name:             sox
-Version:          0.2
+Version:          0.2.0.1
 License:          GPL
 License-File:     LICENSE
 Author:           Henning Thielemann <haskell@henning-thielemann.de>
@@ -46,7 +46,7 @@
     explicit-exception >= 0.1.3 && < 0.2,
     -- that's the way to get compatibility between GHC 6.10 and 6.12
     extensible-exceptions >=0.1.1 && <0.2,
-    transformers >= 0.0.1 && <0.2
+    transformers >=0.2 && <0.3
   If flag(splitBase)
     Build-Depends:
       base >= 2 && <5,
diff --git a/src/Sound/Sox/Signal/List.hs b/src/Sound/Sox/Signal/List.hs
--- a/src/Sound/Sox/Signal/List.hs
+++ b/src/Sound/Sox/Signal/List.hs
@@ -17,7 +17,7 @@
 import qualified Control.Monad.Exception.Synchronous as Sync
 import qualified Control.Monad.Exception.Asynchronous as Async
 
-import Control.Monad.Trans (lift, )
+import Control.Monad.Trans.Class (lift, )
 
 import Foreign.Storable (Storable (..), )